diff --git a/UPGRADE-2.x.md b/UPGRADE-2.x.md
deleted file mode 100644
index c9083ba5..00000000
--- a/UPGRADE-2.x.md
+++ /dev/null
@@ -1,53 +0,0 @@
-UPGRADE 2.x
-===========
-
-UPGRADE FROM 2.11 to 2.12
-=========================
-
-### Every twig filter is prefixed by `sonata_`
-
-- `format_date` is deprecated in favor of `sonata_format_date`.
-- `format_time` is deprecated in favor of `sonata_format_time`.
-- `format_datetime` is deprecated in favor of `sonata_format_datetime`.
-- `number_format_*` is deprecated in favor of `sonata_number_format_*`.
-- `country` is deprecated in favor of `sonata_country`.
-- `locale` is deprecated in favor of `sonata_locale`.
-- `language` is deprecated in favor of `sonata_language`.
-
-UPGRADE FROM 2.7 to 2.8
-=======================
-
-### Timezone detector
-
-``Sonata\IntlBundle\Timezone\TimezoneAwareInterface`` was added in order to provide
-timezone detection for any user class.
-
-Timezone inference based on the ``Sonata\UserBundle\Model\User::getTimezone()`` method
-is deprecated and will be dropped in 3.0 version.
-You MUST implement ``Sonata\IntlBundle\Timezone\TimezoneAwareInterface`` explicitly
-in your user class.
-
-Before:
-```php
-class User
-{
-    // ...
-}
-```
-
-After:
-```php
-class User implements \Sonata\IntlBundle\Timezone\TimezoneAwareInterface
-{
-    // ...
-}
-```
-
-UPGRADE FROM 2.3 to 2.4
-=======================
-
-### Tests
-
-All files under the ``Tests`` directory are now correctly handled as internal test classes.
-You can't extend them anymore, because they are only loaded when running internal tests.
-More information can be found in the [composer docs](https://getcomposer.org/doc/04-schema.md#autoload-dev).
diff --git a/UPGRADE-3.x.md b/UPGRADE-3.x.md
new file mode 100644
index 00000000..a8d6cd6a
--- /dev/null
+++ b/UPGRADE-3.x.md
@@ -0,0 +1,2 @@
+UPGRADE 3.x
+===========
diff --git a/composer.json b/composer.json
index a89f89e0..d1c11d9d 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
         "phpunit/phpunit": "^9.5",
         "psalm/plugin-phpunit": "^0.18",
         "psalm/plugin-symfony": "^5.0",
-        "rector/rector": "^0.16",
+        "rector/rector": "^0.17",
         "symfony/phpunit-bridge": "^6.2",
         "symfony/security-core": "^5.4 || ^6.2",
         "vimeo/psalm": "^5.0"